A mosaic of filaments In the newly assembled mosaic, long strands of cold gas weave through the Milky Way\u2019s center in tightly packed, overlapping lanes.<\/p>\n Working from this sweeping view, Steve Longmore of Liverpool John Moores University (LJMU<\/a>) tracked how those lanes gather into denser knots near the black hole while extending for dozens of light-years across the region.<\/p>\n Rather than scattered clouds, the gas forms a connected network that links vast structures to compact clumps surrounding individual stars.<\/p>\n Seeing the center<\/a> as a continuous system now allows astronomers to test how star-forming material behaves under the intense gravity and radiation found only in a galactic nucleus.<\/p>\n How ALMA saw<\/p>\n In Chile\u2019s Atacama Desert, the Atacama Large Millimeter\/submillimeter Array \u2013 a network of radio dishes called ALMA \u2013 captured cold-gas signals.<\/p>\n Dust blocks starlight, but ALMA detected millimeter wavelengths that pass through dust.<\/p>\n Alongside partners, the European Southern Observatory (ESO<\/a>) helped run the array, which scanned an area as long as three full moons.<\/p>\n Wide coverage lets scientists connect galaxy-wide flows to clouds<\/a> that collapse, instead of treating them as separate problems.<\/p>\n Inside the CMZ<\/p>\n Near the Milky Way\u2019s center, the Central Molecular Zone (CMZ<\/a>), a gas ring around the core, spans 650 light-years, roughly four quadrillion miles (6.4 quadrillion kilometers).<\/p>\n Gravity pulls gas inward, yet turbulence and radiation keep it churning, so clouds do not settle quietly.<\/p>\n At the middle, Sagittarius A* anchors a supermassive black hole, one with millions of times the Sun\u2019s mass, amid crowded gas.<\/p>\n Cold gas composition<\/p>\n Inside the CMZ, ALMA\u2019s Exploration Survey, called ACES, targeted cold molecular gas, gas made of bonded atoms.<\/p>\n Different molecules radiate at different frequencies, so the survey separated chemical fingerprints even when dust hid clouds.<\/p>\n Along with simple gases, ACES picked up dozens of molecules, including methanol, acetone, and ethanol, across the region.<\/p>\n The chemical mix let scientists flag places where gas heated, slammed together, or cooled enough to form new stars.<\/p>\n Filaments form new stars<\/p>\n Across ACES maps, gas lined up into filaments<\/a>, long narrow strands of matter that linked distant clouds to dense clumps.<\/p>\n Gravity drew material along each filament, building knots until parts of the gas became heavy enough to start<\/a> collapsing.<\/p>\n Tighter knots can form protostars, newborn stars still wrapped in gas, and the growing heat transforms the chemistry of the surrounding gas.<\/p>\n Tracing chains from filament to star helps explain where the CMZ does, and does not, convert gas into starlight.<\/p>\n Why the center differs<\/p>\n Near the galactic center, strong tides and shocks kept clouds moving fast, so they stayed warmer than disk clouds.<\/p>\n Higher pressure squeezed gas into dense pockets, while violent motion tore other pockets apart before gravity could finish.<\/p>\n Bright young stars and past supernovae flooded the CMZ with energy, and that heat changed which molecules survived.<\/p>\n Competing forces made it hard to predict where new stars would appear, even when gas piled up.<\/p>\n Massive stars dominate<\/p>\n In parts of the CMZ, dense clusters formed massive stars that burn fuel quickly and pour radiation into their birth clouds.<\/p>\n After a few million years, many of those giants exploded, and shock waves compressed some gas while scattering other gas.<\/p>\n Each explosion left expanding debris, and that debris injected heat and motion into clouds already primed by pressure.<\/p>\n Mapping where explosions hit could show whether blast effects trigger the next round of star birth or shut it down.<\/p>\n Lessons for galaxies<\/p>\n Far beyond the Milky Way, young galaxies built stars in cramped centers, so the CMZ offers a nearby check.<\/p>\n When gas piles up under high pressure, it can form stars in bursts, and those bursts reshape galaxies.<\/p>\n \u201cBy studying how stars are born in the CMZ, we can also gain a clearer picture of how galaxies grew and evolved,\u201d said Longmore.<\/p>\n If those theories fail in the galaxy\u2019s central region, astronomers may need new rules for star formation in the early universe.<\/p>\n After the first maps were complete, the team prepared a public release so others could mine the CMZ without new observations.<\/p>\n Anyone can download the files from the ALMA Science Portal, which bundles full mosaics plus 45 sub-mosaics into manageable packages.<\/p>\n Soon, ALMA\u2019s Wideband Sensitivity Upgrade and the European Southern Observatory\u2019s Extremely Large Telescope should catch fainter gas<\/a> and more stars.<\/p>\n Linking new observations with released maps could pin down how black holes, star formation, and stellar explosions affect one another over time.<\/p>\n Interpreting the new map<\/p>\n Linking chemistry, structure, and star birth into one view, the dataset shows the CMZ as an active network around Sagittarius A*.<\/p>\n Even with sharper telescopes, researchers still must untangle overlapping clouds along our line of sight before drawing final cause-and-effect answers.<\/p>\n The study is published in Arxiv<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read?\u00a0Subscribe to our newsletter<\/a>\u00a0for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on\u00a0EarthSnap<\/a>, a free app brought to you by\u00a0Eric Ralls<\/a>\u00a0and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Astronomers have produced the largest image ever made of the Milky Way\u2019s core, revealing a dense web of…\n","protected":false},"author":2,"featured_media":327798,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[61,60,82],"class_list":{"0":"post-327797","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-ie","9":"tag-ireland","10":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/327797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=327797"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/327797\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/327798"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=327797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=327797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=327797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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